共查询到20条相似文献,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
7.
Asiatic desi cotton (Gossypium arboreum) shows great potential against biotic and abiotic stresses. The stress resistant nature makes it a best source for the identification
of biotic and abiotic stress resistant genes. As in many plants same set of genes show responding behavior against the various
abiotic and biotic stresses. Thus in the present study the ESTs from the G. arboreum drought stressed leaves were subjected to find the up-regulated ESTs in abiotic and biotic stresses through homology and
in-silico analysis. A cDNA library has been constructed from the drought stressed G. arboreum plant. 778 clones were randomly picked and sequenced. All these sequences were subjected to in-silico identification of biotic
and abiotic up-regulated ESTs. Total 39 abiotic and biotic up-regulated ESTs were identified. The results were further validated
by real-time PCR; by randomly selection of ten ESTs. These findings will help to develop stress resistant crop varieties for
better yield and growth performance under stresses. 相似文献
8.
9.
10.
11.
WRKY转录因子是植物一类比较大的基因家族,在水稻中已鉴定出102个成员。研究表明WRKY转录因子在植物生长发育、抗病耐逆等方面都具有重要的作用。本研究利用基因芯片数据结合实时定量分析,对水稻Os WRKY转录因子基因在不同的非生物逆境下的表达进行了分析,发现至少有33个Os WRKY基因同时对任何两种非生物胁迫因子做出响应,且所选20个基因中,13个基因可被ABA所诱导。OsWRKY基因这种重叠表达的特性,预示着这些基因在非生物逆境中具有功能多效性,对于培育抗逆境水稻品种具有重要的理论与实践意义。 相似文献
12.
13.
14.
15.
Sorghum with its remarkable adaptability to drought and high temperature provides a model system for grass genomics and resource for gene discovery especially for abiotic stress tolerance. Group 3 LEA genes from barley and rice have been shown to play crucial role in abiotic stress tolerance. Here, we present a genome-wide analysis of LEA3 genes in sorghum. We identified four genes encoding LEA3 proteins in the sorghum genome and further classified them into LEA3A and LEA3B subgroups based on the conservation of LEA3 specific motifs. Further, expression pattern of these genes were analyzed in seeds during development and vegetative tissues under abiotic stresses. SbLEA3A group genes showed expression at early stage of seed development and increased significantly at maturity, while SbLEA3B group genes expressed only in matured seeds. Expression of SbLEA3 genes in response to abiotic stresses such as soil moisture deficit (drought), osmotic, salt, and temperature stresses, and exogenous ABA treatments was also studied in the leaves of 2-weeks-old seedlings. ABA and drought induced the expression of all LEA3 genes, while cold and heat stress induced none of them. Promoter analysis revealed the presence of multiple ABRE core cis-elements and a few low temperature response (LTRE)/drought responsive (DRE) cis-elements. This study suggests non-redundant function of LEA3 genes in seed development and stress tolerance in sorghum. 相似文献
16.
Plants frequently face challenges caused by various abiotic stresses, including drought, and have evolved defense mechanisms to counteract the deleterious effects of these stresses. The phytohormone abscisic acid (ABA) is involved in signal transduction pathways that mediate defense responses of plants to abiotic stress. Here, we report a new function of the CaDIN1 protein in defense responses to abiotic stress. The CaDIN1 gene was strongly induced in pepper leaves exposed to ABA, NaCl, and drought stresses. CaDIN1 proteins share high sequence homology with other known DIN1 proteins and are localized in chloroplasts. We generated CaDIN1-silenced peppers and overexpressing transgenic Arabidopsis plants and evaluated their response to ABA and drought stress. Virus-induced gene silencing of CaDIN1 in pepper plants conferred enhanced tolerance to drought stress, which was accompanied by low levels of lipid peroxidation in dehydrated leaves. CaDIN1-overexpressing transgenic plants exhibited reduced sensitivity to ABA during seed germination and seedling stages. Transgenic plants were more vulnerable to drought than that by the wild-type plants because of decreased expression of ABA responsive stress-related genes and reduced stomatal closure in response to ABA. Together, these results suggest that CaDIN1 modulates drought sensitivity through ABA-mediated cell signaling. 相似文献
17.
Signal transduction during cold, salt, and drought stresses in plants 总被引:14,自引:0,他引:14
Huang GT Ma SL Bai LP Zhang L Ma H Jia P Liu J Zhong M Guo ZF 《Molecular biology reports》2012,39(2):969-987
Abiotic stresses, especially cold, salinity and drought, are the primary causes of crop loss worldwide. Plant adaptation to
environmental stresses is dependent upon the activation of cascades of molecular networks involved in stress perception, signal
transduction, and the expression of specific stress-related genes and metabolites. Plants have stress-specific adaptive responses
as well as responses which protect the plants from more than one environmental stress. There are multiple stress perception
and signaling pathways, some of which are specific, but others may cross-talk at various steps. In this review article, we
first expound the general stress signal transduction pathways, and then highlight various aspects of biotic stresses signal
transduction networks. On the genetic analysis, many cold induced pathways are activated to protect plants from deleterious
effects of cold stress, but till date, most studied pathway is ICE-CBF-COR signaling pathway. The Salt-Overly-Sensitive (SOS)
pathway, identified through isolation and study of the sos1, sos2, and sos3 mutants, is essential for maintaining favorable ion ratios in the cytoplasm and for tolerance of salt stress. Both ABA-dependent
and -independent signaling pathways appear to be involved in osmotic stress tolerance. ROS play a dual role in the response
of plants to abiotic stresses functioning as toxic by-products of stress metabolism, as well as important signal transduction
molecules and the ROS signaling networks can control growth, development, and stress response. Finally, we talk about the
common regulatory system and cross-talk among biotic stresses, with particular emphasis on the MAPK cascades and the cross-talk
between ABA signaling and biotic signaling. 相似文献
18.
19.
Bushra Jabeen S. M. Saqlan Naqvi Tariq Mahmood Tasawar Sultana Madiha Arif Fariha Khan 《Molecular biotechnology》2017,59(2-3):66-72
Members of the plant glycine-rich RNA-binding proteins (GR-RBPs) family have been reported in flowering, development, circadian rhythms, biotic and abiotic stresses. Particularly, GR-RBPs are reported to function as RNA chaperones, promoting growth and acclimation during cold shock. It is indispensable to further question the efficacy and mechanism of GR-RBPs under various environmental strains. Monitoring the expression of stress-regulated proteins under stress conditions has been a beneficial strategy to study their functional roles. In an effort to elucidate the NtGR-RBP1 function, stress markers such as salinity, drought, low temperature and heat stresses were studied. The NtGR-RBP1 gene was expressed in E. coli followed by the exposure to stress conditions. Recombinant E. coli expressing NtGR-RBP1 were more tolerant to stresses, e.g., salinity, drought, cold and heat shock. Recombinants exhibited higher growth rates compared to control in spot assays. The tolerance was further confirmed by monitoring the growth in liquid culture assays. Cells expressing NtGR-RBP1 under salt (500 mM NaCl), drought (20% PEG), cold (4 and 20 °C) and heat stresses (50 °C) had enhanced growing ability and better endurance. Our study supports the notion that the protective role of NtGR-RBP1 may contribute to growth and survival during diverse environmental stresses. 相似文献
20.
Transcriptional profiling implicates novel interactions between abiotic stress and hormonal responses in Thellungiella, a close relative of Arabidopsis 总被引:8,自引:0,他引:8
下载免费PDF全文
![点击此处可从《Plant physiology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Wong CE Li Y Labbe A Guevara D Nuin P Whitty B Diaz C Golding GB Gray GR Weretilnyk EA Griffith M Moffatt BA 《Plant physiology》2006,140(4):1437-1450